Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas Melvin Kessler, M.D.

Geriatric Medicine (Family Medicine) Physician in Lakeside, AZ · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1578590279

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas Melvin Kessler

Credential M.D.

Sex Male

Practice address 5658 Arizona 260, Lakeside, AZ, 85929

Phone (928) 537-4379

Enumeration date Jun 27, 2006

Last updated in NPPES May 13, 2014

Taxonomy & licenses

207QG0300X Geriatric Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 34130 (AZ) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Thomas Kessler practice?

The practice location on file with NPPES is in Lakeside, AZ. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Thomas Kessler?

The National Provider Identifier (NPI) for Thomas Kessler is 1578590279, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-05-13.